Write a Review
Michelin
Michelin Primacy MXM4 255/40R20XL 101H - 89424
Michelin Primacy MXM4 255/40R20XL 101H - 89424
📧 Get Fitment Help
Verify parts fit & get product recommendations
Lease-to-own for as low as
/week
Get Started
Guaranteed to Fit — confirm your size with the fitment checker on this page
Price Match Guarantee Learn More
Free Mount & Balance
Free Shipping
OUT OF STOCK 
📧 Get Fitment Help
Verify parts fit & get product recommendations
The Michelin Primacy MXM4 in 255/40R20 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.
What 255/40R20 means
In the size 255/40R20, 255 is the section width in millimeters (10.04 in), 40 is the aspect ratio — the sidewall stands 40% as tall as the tire is wide, or 102.0 mm (4.02 in) — R denotes radial construction, and 20 is the wheel diameter in inches. That works out to an overall diameter of about 28.03 inches, turning roughly 719 revolutions per mile. Overall diameter is what matters for speedometer accuracy and clearance when you change sizes, so compare it — not just the width — against your current tire.
The service description on this tire decodes to a load index of 101 — a maximum load of 1,819 lbs per tire. The speed symbol H corresponds to a maximum sustained speed of 130 mph.
Load Range E corresponds to a 10-ply rating.
Specifications
| Size | 255/40R20XL |
| Tire Type | All Season |
| Service Description | 101H |
| Load Index | 101 |
| Speed Rating | H |
| Load Range | Extra Load |
| Section Width (mm) | 255 |
| Aspect Ratio | 40 |
| Overall Diameter (in) | 28 |
| Tread Depth (/32") | 9.5 |
| Treadwear | 500 |
| Traction Grade | A |
| Temperature Grade | A |
| UTQG | 500AA |
| Warranty | 55K |
Frequently asked questions
What does 101H mean on the Michelin Primacy MXM4?
101H breaks down as load index 101 — rated for 1,819 lbs per tire — with an H speed rating, good for a maximum sustained 130 mph.
What kind of tire is the Michelin Primacy MXM4?
The Michelin Primacy MXM4 in 255/40R20 is a all season tire.
What are the treadwear and warranty ratings on the Michelin Primacy MXM4?
This tire carries a treadwear grade of 500, traction grade A, temperature grade A under UTQG. The manufacturer's warranty is 55K.
Keep shopping
Shop all 255/40R20 tires, browse Michelin tires, see every Michelin Primacy MXM4 size, or view all tires at ThreePiece.us.
- BRAND:
- Michelin
- Model:
- Primacy MXM4
- Size:
- 255/40R20XL
- Aspect Ratio:
- 40
- Load Index:
- 101
- Load Range:
- Extra Load
- Section Width:
- 255
- Service Description:
- 101H
- Speed Index:
- H
- Temperature:
- A
- Tire Rim Diameter:
- 28
- Tire Type:
- All Season
- Traction:
- A
- Tread Wear:
- 500
- Tread Depth:
- 9.5
- UQTG:
- 500AA
- Warranty:
- 55K
PRODUCT REVIEWS (0)
Overall Rankings
Have you tried this product?
WRITE A REVIEWNo reviews for this product yet. Be the first to write a review!
Write a Review